BICYCLE SEAT POST CLAMP 34.9MM 3K Bicycle Seat Post Clamp Ultralight Carbon Fiber Seat Tube Clip Bicycle Seat Post Clamp for Mountain Bike MTB Road Bike. This pole clamp is made of qualified carbon fiber, sturdy, durable and durable to use, which ensures a long service life. The 30,2 mm clamp is compatible with a post with a diameter of 27,2 mm, and the 34,9 mm clamp fits a post with a diameter of 30,8 mm and 31,6 mm. premium treatment, not easy to deform, corrosion prevention, excellent durability. Long mounting screw is used to attach the clamp to the post. Easy to install, no complicated procedure required. Suitable for road and mountain bikes. Specification Material: aluminum alloy full carbon fiber Colour: black Inner ring diameter: 34,90 mm (fits seat tube 30,8/30,9/31,6 mm) Saddle clamp height: about 1,8 cm Weight: 18-22 grams. List of packages 1 * bicycle seat post clamp